Improvement in inner soles for boots and shoes



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Letters Patent No. 113,773, dated 18, 1871.

IMPROVEMENT IN INNER SOLES FOR BOOTS AND SHOES.

The Schedule referred to in these Letten Patent and malng part of theIlma.

I, CHARLES P. J oHnsoN, of Jamaica Plain, in the county of Norfolk andState of Massachusetts, have invented a new and useful Improvement onInner Soles for Boots and Shoes, of which the following is aspecification.

Nam/rc and Obiccts of the Invention.

The nature of my invention relates to an improvement on inner soles .forboots and shoes, for the' purpose of keeping lthefeet warm andpreventing the cold and dampness from the ground from being conducted tothe soles of the feet, for which purpose I construct my inner sole asfollows:

On the drawing- Figure 1 is a top View, and

Figure 2 is a central longitudinal section of my inner sole.

The material I employ is a sheet -of mica, or what is generally known asisinglass-stone, of greater cr lesser thickness, inelosed between two ormore sheets of `some protecting material, such as leather, hair, wool,85e.

Mica being a substance that conducts heat or .cold very slowly throughitself, even though very thin sheets of this material are used, ispre-eminently the best materiali'or the purpose of keeping external coldand danipness from conducting itself' to the feet of persons who areexposed to cold and damp Weather and sudden changes fronrwarm and dry todamp and cold atmospheres The thin sheet of mica a on iig. 2 is shown asbeing inelosed on each side between sheets of leather b b, and attachedlthereto by stitches through the whole, as shown on iig. 1.

Any other protecting'material instead of leather may be used for thesame purpose, and the sheet of mica may be attached to the protectingmaterials in any other suitable way besides sewing together.

The mode in which I cut my mica for the above'- named purpose is asfollows:

Either I cut a block of mica of about one inch, more or less, thickness,to the shape of the sole desired, and split it horizontally in as manyand thin sheets as may be needed, or I cut each separate sole out fromsheets of mica of the thickness desired, and attach it between theprotecting materialsin the usual-way. This, my improved inner sole, mayhe used attached to the boot or shoe, or may be made separate so as tobe changed from one shoe to another, asthe casevmay be.

The thin sheets of mica being elastic allow of any desired bending orcurving of the so'les of the boots or shoes during walking, riding,Ste., and will last as long as .the protecting materials hold out.

The sheets of mica can be sewed through as easily as leather of the samethickness, and in this manner a'ords great facility for stitchingtogether to the protecting material that is used.

Having thus described the nature and construction of my invention, A

I wish1 to secure by Letters Patent, and claim- As a new article ofmanufacture, an inner sole for boots and shoes, consisting of a sheet orsheets of mica of greater or lesser thickness, inelosed between anyprotecting materials,'such'as leather, cloth, hair, &c., for the purposeand in a manner as herein fully set forth and described.

CHAS. P. JOHNSON.

Witnesses:v l

ALBAN ANDREW, JOHN SWALANDER. y

